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3 years ago

Can someone pls help for brainlest

Mathematics

1 answer:

trapecia [35]3 years ago

5 0

Answer:

The area of the shaded region= 37.68

Step-by-step explanation:

Area of the outer circle= 2* 3.14* 36 (Area of the circle=2 $\pi$ r)

=113.04

Area of the inner circle=2*3.14* 12

=75.36

Area of the shaded region= Area of the outer circle- Area of the inner circle

= 113.04- 75.36

=37.68

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andre [41]

Answer:

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Step-by-step explanation:

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3 years ago

N+(-n) = 3+ 15<br><br> Solve

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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A sample of 100 people is classified by gender (male/female) and by whether they are registered voters. The sample consists of 8

uysha [10]

Answer:

Step-by-step explanation:

Given :

Male Female Total

Registered 60

Non registered 40

Total 20 80

Solution :

N= 100

Formula of expected frequency = $E_{ij}=\frac{T_i \times T_j}{N}$

$E_{ij}$ = expected frequency for the ith row/jth columm.

$T_i$ = total in the ith row

$T_j$ = total in the jth column

N = table grand total.

So, using formula $E_{11}=\frac{T_1 \times T_1}{100}$

$E_{11}=\frac{60 \times 20}{100}$

$E_{11}=12$

$E_{12}=\frac{T_1 \times T_2}{100}$

$E_{12}=\frac{60 \times 80}{100}$

$E_{12}=48$

$E_{21}=\frac{T_2 \times T_1}{100}$

$E_{21}=\frac{40 \times 20}{100}$

$E_{21}=8$

$E_{22}=\frac{T_2 \times T_2}{100}$

$E_{22]=\frac{80 \times 40}{100}$

$E_{22}=32$

Expected frequency table

Male Female Total

Registered 12 48 60

Non registered 8 32 40

Total 20 80

So, the expected frequency for males who are registered voters are $E_{11}=12$

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3 years ago

Is -56 greater than 36

postnew [5]

No it’s less than because it’s negative

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4 years ago

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